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Rouge Beer

This Beer Was Brewed Using Yeast Grown in a Beard

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Rouge Beer

Beer basically consists of four things: hops, barley, water, and yeast. The hops add that flavor that we’ve come to know as beer, but without yeast, no one would experience its intoxicating effects. Of the more than 1600 strains of yeast, only a select few can ferment sugars into alcohol. While most yeast, which is a fungus, comes from rotting fruits, bugs, or animals, a new strain being used by Rogue Brewery in Newport, Oregon, came from a most unlikely place—the master brewer’s beard.

The Rogue brewers had been searching for an exclusive yeast to match with their homegrown barley and hops and sent three samples they found in their hop yard to culture. Sample after sample failed to produce yeast that would ferment.    

Someone joked that brew master John Maier’s 34-year-old beard might be a perfect medium to grow yeast. He agreed to try it, and plucked nine hairs from his beard, which were sent to White Labs for testing and culturing (culturing makes it seem as if the hairs watched opera and read Shakespeare, but it means they were primed to grow yeast). It turns out, Maier's beard hairs can produce yeast—and pretty decent yeast at that.

Maier’s beard yeast is a blend of Rogue’s workhorse yeast, Pacman, and a wild brewer’s yeast. Wild brewer’s yeasts act unpredictably, only fermenting some of the alcohol, but in the case of the beard yeast, it worked so well that it created a crisp flavor not typically associated with the unruly varieties. It was such a shock that the scientists at White Labs double-checked the results because they feared they had accidentally profiled the Pacman yeast instead of the beard yeast.  

This caused us to wonder why Maier’s beard has such an interesting yeast blend. It turns out that yeast isn’t very mobile. Someone or something has to transport the yeast. But, these fungi grow uncontrollably in places like a brewery. So unknown to Maier, he was a walking Petri dish for the Pacman yeast used at Rogue. And he might have picked up the wild yeast from eating something fruity, creating this unique blend for beer. The brewery notes that Maier's beard has attended more than 15,000 brews, making it the perfect habitat for this unusual yeast.

When Maier, who vows never to cut his beard, learned that his facial hair was home to a unique yeast blend, he said, “It was in front of me the whole time and it only took two centuries and five decades to grow.”

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iStock // Ekaterina Minaeva
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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Nick Briggs/Comic Relief
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What Happened to Jamie and Aurelia From Love Actually?
May 26, 2017
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Nick Briggs/Comic Relief

Fans of the romantic-comedy Love Actually recently got a bonus reunion in the form of Red Nose Day Actually, a short charity special that gave audiences a peek at where their favorite characters ended up almost 15 years later.

One of the most improbable pairings from the original film was between Jamie (Colin Firth) and Aurelia (Lúcia Moniz), who fell in love despite almost no shared vocabulary. Jamie is English, and Aurelia is Portuguese, and they know just enough of each other’s native tongues for Jamie to propose and Aurelia to accept.

A decade and a half on, they have both improved their knowledge of each other’s languages—if not perfectly, in Jamie’s case. But apparently, their love is much stronger than his grasp on Portuguese grammar, because they’ve got three bilingual kids and another on the way. (And still enjoy having important romantic moments in the car.)

In 2015, Love Actually script editor Emma Freud revealed via Twitter what happened between Karen and Harry (Emma Thompson and Alan Rickman, who passed away last year). Most of the other couples get happy endings in the short—even if Hugh Grant's character hasn't gotten any better at dancing.

[h/t TV Guide]

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